Aeronautical Standard - Bolt - AN7-7A



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Aeronautical Standard - Bolt - AN7-7A
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Aeronautical Standard - Bolt - AN7-7A
Standard Part

Description:     Bolt
Part Number:     AN7-7A

Item Description

An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. the threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. for items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.

Features and Characteristics

Thread Class:3a
Thread Direction:Right-hand
Thread Length:0.657 inches
Fastener Length:0.969 inches
Head Style:Hexagon
Head Height:Between 0.234 inches and 0.266 inches
Width Between Flats:Between 0.615 inches and 0.627 inches
Thread Diameter:0.438 inches
Grip Length:0.312 inches
Features Provided:Finished head
Thready Qty Per Inch (tpi):20
Min. Tensile Strength (psi):125000 pounds per square inch
Hardness Rating:26.0 rockwell c and 32.0 rockwell c
Material:Steel comp 4037 or steel comp 4130 or steel comp 8630 or steel comp 8735 or steel comp 8740 or steel comp 4140
Material Specification:Mil-b-6812 military specification all material responses
Surface Treatment:Cadmium and chromate
Surface Treatment Specification:Qq-p-416, type 2, cl 3 federal specification all treatment responses
Thread Series Designator:Unf
FSC:5306 Bolts

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